>> i like to call this fiction science instead of science fiction. this is completely baseless. there's not a shred of evidence in favor of it. but it sure is a lot of fun to be worrying about the end of the world. hollywood knows that, too. as far as the mayan calendar is considered, alex, this is a complete misunderstanding of how calendars work. look, we faced this kind of calendar cliff every year when on december 31 you run out of pages on your calendar. you don't think it's the end of the world. you just think it's time to go to the stationery store and buy a new calendar. we are according to some experts coming to an end of one of the mayan's long cycle of days. but they themselves the living descendants of the mayan say a new cycle will begin. >> the buru four times the size of earth will come close to earth and cause all kinds of disasters. any truth there? >> absolutely not. the buru as it's called is a completely made up planet from the name of an ancient sumerian god. can you imagine, alex, if there really were a planet that big coming close to us now in december? is